Hot Contactors, Batman!

[burnem83]

Are you sure

I always thought V=IR,

 

[Djuro Emedji]

Do you drive your DC coil via a resistor and normally closed late break auxiliary contact according to ABB "... DC and AC operated contactors have the same magnet structure except the DC coil includes a resistor and a normally closed late break
auxiliary interlock. To order, substitute the code from the coil voltage selection chart and refer to the DC magnet coils chart for the price ... "?
The text is from document:
http://www.galco.com/techdoc/abbg/ehdb220c2p-1l_dat.pdf

 

[milldrone]

When you went down on the voltage it made the amps go up.

This is true in an AC world where inductance and CEMF play a role. But the original posters problem is DC.

 

[milldrone]

DC and AC operated contactors have the same magnet structure except the DC coil includes a resistor and a normally closed late break
auxiliary interlock.

Previously I had seen this feature on size 6 and larger contactors. But I see from your PDF that ABB now offers this in sizes down to 75 amps.